Load Scala file into interpreter to use functions?

Question

I have some Scala functions defined in a file, not in a class, and I would like to use them in the Scala interpreter. I know I can say scala filename.scala to simply run the file and exit the interpreter, but I would like to run the file and then stay in the interpreter so I can do some testing. Can anyone tell me how to simply load a file into the interpreter so I can use the functions defined within it?

Awesome, that's exactly what I was looking for. Don't know why it was so hard to find. — , Sep 12 '11 at 05:29
Jamil, please, post this as an answer, so that Bea Metitiri could mark it as an answer. — Illarion Kovalchuk, Sep 12 '11 at 08:59

Jamil · Accepted Answer · 2011-09-12T10:22:22.190

102

type :load /path/to/file in Scala REPL.

You can get complete list of available commands by typing :help

edited Sep 12 '11 at 10:22

answered Sep 12 '11 at 09:46

Jamil

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This seems to evaluate it one definition at a time, which doesn't work if the file has a sealed trait or forward references. `:paste /path/to/file` works better, as mentioned in Suresh's answer. – Brian McCutchon Sep 10 '17 at 21:07

score 24 · Answer 2 · edited May 31 '17 at 01:03

On occasions, :paste might be your better friend (than :load). Here is an example on how to use :paste.

scala> :paste
// Entering paste mode (ctrl-D to finish)

if (true)
  print("that was true")
else
  print("false")

[Ctrl-D]

// Exiting paste mode, now interpreting.

that was true

One can also use :paste to load a file using following command :paste [path]

scala> :paste ~/Desktop/repl_seeder.scala
Pasting file ~/Desktop/repl_seeder.scala...
defined object test1

scala> test1.main(Str)
my first scala program

score 4 · Answer 3 · answered Dec 20 '15 at 14:25

4

Just reminder, put the complete path. I found problem in Linux by doing like this:

:load ~/fileName.scala

to get rid of error "That file does not exist" I did

:load /complete/path/fileName.scala

answered Dec 20 '15 at 14:25

Esmaeil MIRZAEE

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That's only a problem because Scala doesn't know how to expand `~` to your home directory. – Shane Bishop Jan 25 '21 at 23:40
relative paths are supported, too. So if you do `:load foo/bar/baz.scala`, it works, at least of today. – 18446744073709551615 Aug 25 '22 at 08:27

Load Scala file into interpreter to use functions?

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